MEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME

Introduced: September 1968

Last revised: January 1990

Classification Context

Section:: PHYSICS
Class:: MEASURING; TESTING
Subclass:: MEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME

Description

This subclass encompasses instruments and methods for quantifying fluid volumes, flow rates, and liquid levels across industrial, scientific, and domestic applications. Coverage includes volumetric flowmeters (turbine, gear, and piston types), mass flowmeters (Coriolis and thermal devices), liquid level indicators (float, capacitive, and ultrasonic), and positive displacement metering pumps. The classification extends to flow measurement principles using differential pressure, electromagnetic, and vortex-shedding techniques, as well as apparatus for calibration and testing of such instruments.

Scope Notes

Limiting references: Measuring linear dimensions to determine volume | Application references: Milk flow sensing devices in milking machines or devices Food containers with dispensing devices for dispensing a certain quantity of powdered or granulated foodstuffs Apparatus for making beverages having water-level controls Measuring blood flow , Metering media introduced into the human body, e.g. drip meters Controlling the quantity of fluent-solid material fed into a container during packaging by volumetric measurement Controlling the quantity of plastic material, semi-liquids, liquids, or mixed solids and liquids, fed into a container during packaging by volumetric measurement Separating measured quantities from supply by volume measurement Bottling liquids or semi-liquids with provision for metering the liquids to be introduced, e.g. when adding syrups Arrangements of liquid volume meters or volume-flow meters in liquid-delivering apparatus, e.g. for retail sale purposes Measuring liquid level in wells Indicating devices for lubricant level Measuring intake air flow to generate a control signal for control of supply of combustible mixture in combustion engines Proportioning devices in lubricating systems Arrangements for measuring the quantity of conveyed product in pipe-lines Adaptation of level indicators to, or mounting on, steam boilers Controlling water feed or water level for steam generation Rainfall or precipitation gauges Apparatus actuated by coins, cards or the like with meter-controlled dispensing of liquid or gas Reactor-coolant flow measuring or monitoring in nuclear reactors; Moderator- or coolant-level detecting devices in nuclear reactors , Accumulators combined with arrangements for measuring, testing, or indicating condition, e.g. level or density of the electrolyte

Related Keywords

measuring fluid FLOWmeasuring volume, volume flow, or level of FLUID(S)measuring volume of GAS(ES)measuring volume, volume flow, or level of LIQUID(S)measuring VOLUMEmetering by VOLUME

13 direct subcodes

Child Classifications

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G01F 1/00 Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
G01F 11/00 Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it
G01F 13/00 Apparatus for measuring by volume and delivering fluids or fluent solid materials, not provided for in the preceding groups
G01F 15/00 Details of, or accessories for, apparatus of groups insofar as such details or appliances are not adapted to particular types of such apparatus
G01F 17/00 Methods or apparatus for determining the capacity of containers or cavities, or the volume of solid bodies
G01F 19/00 Calibrated capacity measures for fluids or fluent solid material, e.g. measuring cups
G01F 22/00 Methods or apparatus for measuring volume of fluids or fluent solid material, not otherwise provided for
G01F 23/00 Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
G01F 25/00 Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
G01F 3/00 Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow
G01F 5/00 Measuring a proportion of the volume flow
G01F 7/00 Volume-flow measuring devices with two or more measuring ranges; Compound meters
G01F 9/00 Measuring volume flow relative to another variable, e.g. of liquid fuel for an engine